package Example10.Demo01;

import java.sql.*;
import java.util.Scanner;

public class Demo01 {
    /**
     * 模拟添加用户业务
     */
    public static void main(String[] args)  throws SQLException {
        Statement stmt = null;
        ResultSet re = null;
        Connection conn = null;
        try {
            //1. 注册数据库驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            //2. 通过DriverManager获取数据库连接
            String url =
                    "jdbc:mysql://localhost:3306/jdbc?serverTimezone=GMT%2B8&useSSL=false";
            String username = "root";//数据库账户
            String password = "123456";
            conn = DriverManager.getConnection(url, username, password);
            //3. 通过Connnection对象获取Statement对象
            stmt = conn.createStatement();
            // 4.使用Statement执行SQL语句
            /**
             * 终端用户输入用户名 密码 邮箱
             * 将终端用户的输入添加打到数据库
             */
            Scanner sc = new Scanner(System.in);
            System.out.println("请输入用户姓名");
            String un = sc.next();
            System.out.println("请输入用户密码");
            String pd = sc.next();
            System.out.println("请输入用户邮箱");
            String em= sc.next();
            String insertSQL ="insert into users(name, password, email) values(?,?,?)";
            PreparedStatement pm = conn.prepareStatement(insertSQL);//对插入sql进行处理
            pm.setString(1, un);//将第一个？绑定成un的值
            pm.setString(2, pd);//将第二个？绑定成pd的值
            pm.setString(3, em);//将第三个？绑定成em的值
            pm.executeUpdate();


            String sql = "select * from users";
            re = stmt.executeQuery(sql);
            //5.显示结果集合
            System.out.println("id   |   name   |  password   |   email    |   birthday  ");
            while (re.next()) {
                int id = re.getInt("id");
                String name = re.getString("name");
                String pswd = re.getString("password");
                String email = re.getString("email");
                String birthday = re.getString("birthday");
                System.out.println(id+"|"+name+"|" +pswd+ "|" +email+"|"+birthday);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }finally {
            if ( re  !=null){
                try {
                    re.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                re = null;
            }
            if (stmt!=null){
                try {
                    stmt.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                stmt = null;
            }
            if (conn!=null){
                try {
                    conn.close();
                }catch (SQLException e){
                    e.printStackTrace();
                }
                conn = null;
            }
        }
    }
}